Wireshark mailing list archives

Re: string manipulation


From: Guy Harris <guy () alum mit edu>
Date: Mon, 25 Jan 2010 13:21:43 -0800


On Jan 25, 2010, at 1:11 PM, Brian Oleksa wrote:

                   char flowname[9];
                   strncpy(flowname, ptr, 8);
                   flowname[8] = '\0';
                   ptr += 8;
                   proto_tree_add_uint_format(helen_sub_tree, 
hf_helen_length, tvb, offset, 8, 0,
                           "Flowname: %s", flowname);

It's a string, not a number, so don't use proto_tree_add_uint_format(), or any other proto_tree_add_uint routine.

If it's an 8-octet field containing a null-padded string (presumably the string can have 8 octets), you should use 
something such as

        proto_tree_add_string(helen_sub_tree, hf_helen_flowname, tvb, offset, 8, flowname);

In the developers README file... it tells you NOT to use strcpy...but 
instead use g_snprintf().

It doesn't say "don't use strncpy()".

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